/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.remote.utils;

import org.apache.dolphinscheduler.common.utils.NetUtils;

import java.net.InetSocketAddress;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.netty.channel.Channel;

/**
 * channel utils
 */
public class ChannelUtils {

  private static final Logger LOGGER = LoggerFactory.getLogger(ChannelUtils.class);

  private ChannelUtils() {
    throw new IllegalStateException(ChannelUtils.class.getName());
  }

  /**
   * get local address
   *
   * @param channel channel
   * @return local address
   */
  public static String getLocalAddress(Channel channel) {
    return NetUtils.getHost(((InetSocketAddress) channel.localAddress()).getAddress());
  }

  /**
   * get remote address
   *
   * @param channel channel
   * @return remote address
   */
  public static String getRemoteAddress(Channel channel) {
    return toAddress(channel).getAddress();
  }

  /**
   * channel to address
   *
   * @param channel channel
   * @return address
   */
  public static Host toAddress(Channel channel) {
    InetSocketAddress socketAddress = ((InetSocketAddress) channel.remoteAddress());
    if (socketAddress == null) {
      // the remote channel already closed
      LOGGER.warn("The channel is already closed");
      return Host.EMPTY;
    }
    return new Host(NetUtils.getHost(socketAddress.getAddress()), socketAddress.getPort());
  }

}
